Maximum Level of Question & Answer inside an interactive process: how

Hi,

i'm developing an interactive process.
It's made up with a parent process and 2 child processes. 

However, in the parent process, i came at the point that I couldn't insert an answer and a question more, because all the options to insert something else into the process result disabled. 

I remember that the maximum level to insert answer & question is 4 and in fact I realized two child processes to around it.
But now, I can't use this way because the new Answer & questions are only two more, and ifI create a new child process, I couldn't be able to save into the parent process the data founded into the child process (consider that the interactive process is an interview to find any information from a list of lead).     

How can I get around this?

thanks for the help

Luca